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    LCM for 7 and 28

    "Least Common Multiple" Calculator

    Least Common Multiple of

    and

    What's the Least Common Multiple (LCM) of 7 and 28?

    Answer

    LCM of 7 and 28 is
    28

    (Twenty-eight)

    Finding LCM for 7 and 28 using GCF of these numbers

    The first method to find LCM for numbers 7 and 28 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

    LCM = (Number1 × Number2) ÷ GCF

    GCF of numbers 7 and 28 is 7, so

    LCM = (7 × 28) ÷ 7

    LCM = 196 ÷ 7

    LCM = 28

    Finding LCM for 7 and 28 by Listing Multiples

    The second method to find LCM for numbers 7 and 28 is to list out the common multiples for both numbers and pick the first one that matches:

    Multiples of 7: 7, 14, 21, 28, 35, 42

    Multiples of 28: 28, 56, 84

    So the LCM for 7 and 28 is 28

    Finding LCM for 7 and 28 by Prime Factorization

    Another method to find LCM for numbers 7 and 28 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

    All Prime Factors of 7: 7 (exponent form: 71)

    All Prime Factors of 28: 2, 2, 7 (exponent form: 22, 71)

    71 × 22 = 28

    Related Calculations

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    What is the LCM of 7 and 28?. The LCM of 7 and 28 is 28 — the smallest common multiple of both integers.
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    LCM Table

    Number 1Number 2LCM
    71284
    71391
    71414
    715105
    716112
    717119
    718126
    719133
    720140
    72121
    722154
    724168
    725175
    726182
    727189
    72828
    730210
    731217
    734238
    73535
    739273
    741287
    743301
    744308
    745315
    747329
    748336
    74949
    750350
    751357

    About "Least Common Multiple" Calculator

    This calculator will help you find the Least Common Multiple (LCM) of two numbers. For example, it can help you find out what's the Least Common Multiple (LCM) of 7 and 28? (The answer is: 28). Select the first number (e.g. '7') and the second number (e.g. '28'). After that hit the 'Calculate' button.
    Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers
    "Least Common Multiple" Calculator

    Least Common Multiple of

    and

    FAQ

    What's the Least Common Multiple (LCM) of 7 and 28?

    LCM of 7 and 28 is 28

    How to find the LCM of 7 and 28 using prime factorization?

    To find the LCM of 7 and 28, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 28.

    What is the difference between LCM and GCF?

    LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 7 and 28: LCM = 28, GCF = 7.

    See Also